Wrist watch casing



FIG. 1 is a front, bottom, left side perspective view of a wrist watch casing showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is an end view thereof, the opposite end view being a mirror image.

The broken line showing is of environmental material and forms no part of the claimed design. 

The ornamental design for a wrist watch casing, as shown and described. 